Secret Documents: Guantanamo Interrogators Worked Without Nuance : The Two-WaySecret documents reveal that interrogators at Guantanamo were ill prepared to gather reliable intelligence from prisoners at the camp. Some interrogators didn't have the language skills and would reward prisoners with McDonald's for being helpful.

Among the trove of secret military documents that we reported on today are new details about the evidence that has been gathered on the men who have been detained at the Guantanamo Bay prison in Cuba.

The documents, which included a two-page memo from 2008 entitled "The Threat Matrix," offer a glimpse of how interrogators worked to identify detainees and find any terrorism links. The job required a great deal of sleuthing and old fashioned guesswork. Part of the problem, the documents indicated, was that a great deal was left to an interrogator's interpretation and judgment.

Jim Clemente was in charge of the FBI's Behavioral Analysis Unit down at Guantanamo and went to the base to try to teach young interrogators how to build a rapport with detainees to get information. He said there were lots of young interrogators there who didn't have a lot of experience with this sort of questioning and the matrix was supposed to speak to them. "You have to teach to the lowest common denominator," Clemente said. "And that Matrix is a very simplistic way of looking at things. The truth is, there are very nuanced ways that experts in the field use that goes above and beyond what's on that paper."

Without nuance, or even the language (many interrogators didn't speak Arabic and had to speak to detainees through interpreters), the quality of the information from detainees was often like a bad game of telephone, said Clemente. What the detainees said to start with was often different than what eventually made its way into an assessment file, he said.

The military assessments put in stark relief just how thin some of the evidence against the detainees may have been. For example, one common way officials determined someone was a member of al-Qaida was by having some other detainees simply identify him as a member of the group.

The assessments themselves read like a Who's Who of terrorism: one detainee would say another detainee met with Osama bin Laden or had dinner with his deputy Ayman al Zawahiri and they would often be rewarded for the information. (Happy Meals from the Guantanamo McDonald's was one of the favored prizes for detainees who were helpful during interrogations. Detainee names and their identification numbers are sprinkled throughout the documents in citations about intelligence. The Happy Meal prizes are not mentioned.)

The documents also indicate that some intelligence came from other detainees who had mental illnesses or those who had been tortured (like Abu Zubaydah and Khalid Sheikh Mohammed, the accused 911 mastermind).

There was Yemeni informant named Yasim Basardah whose statements appeared in the files of at least 30 other detainees.

The habeas process, in which federal judges would review the cases against detainees to determine whether there was a compelling reason to keep them behind bars, provided a check on the process.

White House press secretary Jay Carney told reporters on Monday that the Obama administration condemns the release of classified information. He said NPR and the New York Times' decision to publish parts of the documents was "unfortunate." Carney said the White House has been aware of the detainee briefs, but he declined to talk about intelligence matters.